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本文提出了拖拉机的性能是靠各功能系统尺寸链终结环保证的,而新机器使用之后,各功能系统尺寸链的终结环处于变化之中,这种变化导致拖拉机功能指标下降,直至超过标准而失效的观点;同时根据只有各功能系统尺寸链终结环得到补偿,机器的性能指标才能恢复的道理,进而提出拖拉机功能失效服从威布尔分布,并按威布尔分布函数规律,得出恢复性修理的必要性。
This paper proposes that the performance of a tractor is guaranteed by the end-of-loop of the size chain of each functional system. After the new machine is used, the final ring of the size chain of each functional system is undergoing changes. This change causes the tractor’s functional index to drop until it exceeds the standard At the same time, according to the theory that only the end ring of the size chain of each functional system can be compensated, the performance index of the machine can be recovered. Then, the failure of tractor is obeyed by Weibull distribution and the law of Weibull distribution function is deduced. necessity.